Bloomfield 1090K, 1093NF Installation Manual

10 Sunnen Drive

St. Louis, MO 63143

telephone: [phone]

fax: [phone]

www.wellsbloomfield.com

BLOOMFIELD INDUSTRIES

645

OWNERS MANUAL

for

E. B. C.™

Electronic

Brew

Control ™

DUAL

AIRPOT AND THERMAL

COFFEE BREWERS

Model 1092 Brewer

with optional
7759 Airpots

E.B.C.™ brewers are protected under

U. S. Patent # 5, 704,275

Other U. S. and Canadian patents pending.

MODELS
1090 1091
1092 1093

Includes:

Installation
Use & Care

Servicing Instructions

p/n DD-75908 Rev. F M645 090721

NOTE: For your protection, please note that equipment in
this shipment was carefully inspected and packaged by
skilled personnel before leaving the factory.
Upon acceptance of this shipment, the transportation
company assumes full responsibility for its safe delivery.

IF SHIPMENT ARRIVES DAMAGED:

1. VISIBLE LOSS OR DAMAGE: Be certain that any
visible loss or damage is noted on the freight bill
or express receipt, and that the note of loss or damage
is signed by the delivery person.

2. FILE CLAIM FOR DAMAGE IMMEDIATELY:
Regardless of the extent of the damage.

3. CONCEALED LOSS OR DAMAGE: if damage is
unnoticed until the merchandise is unpacked, notify the
transportation company or carrier immediately, and file
“CONCEALED DAMAGE” claim with them. This
must be done within fifteen (15) days from the date the
delivery was made to you. Be sure to retain the
container for inspection.

Wells Bloomfield cannot assume liability for damage or loss
incurred in transit. We will, however, at your request, supply
you with the necessary documents to support your claim.

WARRANTY STATEMENT

SERVICE POLICY AND PROCEDURE GUIDE

ADDITIONAL WARRANTY EXCLUSIONS

SHIPPING DAMAGE CLAIMS PROCEDURE

1. Resetting of safety thermostats, circuit breakers,
overload protectors, or fuse replacements unless
warranted conditions are the cause.

2. All problems due to operation at voltages other than
specified on equipment nameplates; conversion to
correct voltage must be the customer’s responsibility.

3. All problems due to electrical connections not made in
accordance with electrical code requirements and
wiring diagrams supplied with the equipment.

4. Replacement of items subject to normal wear, to include
such items as knobs and light bulbs. Normal maintenance

functions including adjustment of thermostats, microswitches,

and replacement of fuses and indicating lights are not

covered under warranty.

5. All problems due to inadequate water supply, such as

fluctuating, or high or low water pressure.

6. All problems due to mineral/calcium deposits, or

contamination from chlorides/chlorines. De-liming is
considered a preventative maintenance function and is
not covered by warranty.

All electrical equipment manufactured by WELLS
BLOOMFIELD is warranted against defects in materials and
workmanship for a period of one year from the date of original
installation or eighteen (18) months from the date of shipment
from our factory, whichever comes first, and is for the benefit
of the original purchaser, except that:
a. airpots carry a 30 day parts warranty only.
b. dispensers; i.e., tea and coffee carry a 90 days parts
warranty only, decanters excluded.

THE FOREGOING OBLIGATION IS EXPRESSLY GIVEN IN
LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, WHICH ARE HEREBY EXCLUDED.

BLOOMFIELD INDUSTRIES DIVISION / SPECIALTY
EQUIPMENT MANUFACTURING CORPORATION SHALL
NOT BE LIABLE FOR INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES FROM ANY
CAUSE WHATSOEVER.

This warranty is void if it is determined that upon inspection by
an Authorized Service Agency that the equipment has been
modified, misused, misapplied, improperly installed, or
damaged in transit or by fire, flood or act of God.

It also does not apply if the serial nameplate has been
removed or unauthorized service personnel perform service.
The prices charged by Wells Bloomfield for its products are
based upon the limitations in this warranty. Seller’s obligation
under this warranty is limited to the repair of defects without
charge by a Wells Bloomfield Authorized Service Agency or
one of its sub-agencies. This service will be provided on
customer’s premises for non-portable models. Portable
models (a device with a cord and plug) must be taken or
shipped to the closest Authorized Service Agency,
transportation charges prepaid, for services.

In addition to restrictions contained in this warranty, specific
limitations are shown below (Additional Warranty Exclusions).
Wells Bloomfield Authorized Service Agencies are located in
principal cities.

This warranty is valid in the United States and void elsewhere.
Please consult your classified telephone directory or your food
service equipment dealer; or, for information and other details
concerning warranty, write to:

Service Parts Department

Wells Bloomfield, LLC
10 Sunnen Dr. P.O. Box 430129
St. Louis, MO 63143 USA

Phone: [phone] Fax: [phone]

7. Full use, care and maintenance instructions are supplied
with each machine. Those miscellaneous adjustments
noted are customer responsibility. Proper attention will
prolong the life of the machine.

8. Travel mileage is limited to sixty (60) miles from an
authorized Service Agency or one of its sub-agencies.

9. All labor shall be performed during normal working hours.
Overtime premium shall be charged to the customer.

10. All genuine Bloomfield replacement parts are warranted
for ninety (90) days from date of purchase on
non- warranted equipment.

Any use of non-genuine Wells Bloomfield parts
completely voids any warranty.

11. Installation, labor and job check-out are not considered
warranty.

12. Charges incurred by delays, waiting time or operating
restrictions that hinder the service technicians ability
to perform services are not covered by warranty.
This includes institutional and correctional facilities.

xi

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

TABLE OF CONTENTS

WARRANTY STATEMENT xi
SPECIFICATIONS 1
FEATURES & OPERATING CONTROLS 2
PRECAUTIONS & GENERAL INFORMATION 3
AGENCY LISTING INFORMATION 3
INSTALLATION INSTRUCTIONS 4
OPERATION 6
BREWING COFFEE 10
CLEANING INSTRUCTIONS 11
TROUBLESHOOTING SUGGESTIONS 12
Error Detection 13
SERVICING INSTRUCTIONS 14
Deliming Instructions 20
EXPLODED VIEWS & PARTS LISTS 22

WIRING DIAGRAMS 26

SPECIFICATIONS

AMPS

MODEL STYLE VOLTS

1090 k

Thermal 120/240V 4000W 16.7A

1090R
1091k

Thermal 115/230V 7000W 30.4A

1091R
1092k

Airpot 120/240V 4000W 16.7A1092R
1092SS
1093k

Airpot 115/230V 7000W 30.4A1093N
1093R

WATTS 1ø

Thank You for purchasing this

Wells Bloomeld appliance.

Proper installation, professional
operation and consistent
maintenance of this appliance will
ensure that it gives you the very
best performance and a long,
economical service life.

This manual contains the
information needed to properly
install this appliance, and to use,
care for and maintain or repair the
appliance in a manner which will
ensure its optimum performance.

POWER
SUPPLY

3-Wire (L1,
L2, Neut)
plus ground,
Cord NOT
Supplied

APPLICABILITY

This manual applies to the following Wells Bloomeld E. B. C.

1090 1090R
1091 1091R

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

1092 1092R 1092SS
1093 1093NF 1093R

1

®

products:

FEATURES AND OPERATING CONTROLS

Fig. 1 Features & Operating Controls

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

2

PRECAUTIONS AND GENERAL INFORMATION

E9253

E9253

STD 4

WARNING: ELECTRIC SHOCK HAZARD

All servicing requiring access to non-insulated components must be performed by qualied

service personnel. Do not open any access panels which require the use of tools.
Failure to heed this warning can result in electrical shock.

WARNING: INJURY HAZARD

All installation procedures must be performed by qualied personnel with full knowledge of all

applicable electrical and plumbing codes. Failure could result in property damage and
personal injury.

WARNING: ELECTRIC SHOCK HAZARD

Brewer must be properly grounded to prevent possible shock hazard. DO NOT assume a
plumbing line will provide such a ground. Electrical shock will cause death or serious Injury.

WARNING: BURN HAZARD

This appliance dispenses very hot liquid. Serious bodily injury from scalding can occur from
contact with dispensed liquids.

This appliance is intended for commercial use only.
This appliance is intended for use to brew beverage products for

human consumption. No other use is recommended or
authorized by the manufacturer or its agents.

This appliance is intended for use in commercial establishments,
where all operators are familiar with the appliance use,
limitations and associated hazards. Operating instructions and
warnings must be read and understood by all operators and
users.

Except as noted, this piece of equipment is made in the USA and
has American sizes on hardware. All metric conversions are ap­proximate and can vary in size.

The following trouble shooting, component views and parts lists
are included for general reference, and are intended for use by

qualied service personnel.

This manual should be considered a permanent part of this
appliance. The manual must remain with the appliance if it is
sold or moved to another location.

AGENCY LISTING INFORMATION

This brewer is and

listed under UL le E9253.

CAUTION:

EQUIPMENT DAMAGE

DO NOT plug in or energize this
appliance until all Installation
Instructions are read and followed.
Damage to the Brewer will occur if
these instructions are not followed.

CAUTION:

BURN HAZARD

Exposed surfaces of the
appliance, brew chamber and
Airpot or Server may be HOT to
the touch, and can cause serious
burns.

This brewer meets
operated and maintained in accordance with the enclosed

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

instructions.

Standard 4 only when installed,

3

INSTALLATION INSTRUCTIONS

READ THIS CAREFULLY BEFORE STARTING THE INSTALLATION

IMPORTANT:

To enable the installer to make
a quality installation and to
minimize installation time, the
following suggestions and tests
should be done before the
actual unit installation is started:

CAUTION:

EQUIPMENT DAMAGE

DO NOT plug in or energize this
appliance until all Installation
Instructions are read and
followed. Damage to the
Brewer will occur if these
instructions are not followed.

CAUTION:

UNSTABLE
EQUIPMENT HAZARD

It is very important for safety
and for proper operation that the
brewer is level and stable when

standing in its nal operating

position. Provided adjustable,
non-skid legs must be installed
at each corner of the unit.
Failure to do so will result in
movement of the brewer which
can cause personal Injury and/
or damage to brewer.

NOTE: Water supply inlet line
must meet certain minimum
criteria to insure successful
operation of the brewer.

Bloomeld recommends 1/4”

copper tubing for installation of
less than 25 feet and 3/8” for
more than 25 feet from a 1/2”
water supply line.

Unpack the unit. Inspect all components for completeness and
condition. Ensure that all packing materials have been removed
from the unit.

Verify that the Spray Head Gasket and Spray Disk are properly
installed.

LEVELING THE UNIT

Verify that an adjustable leg is installed at each corner of the
brewer, and that a rubber foot is installed on each leg.

Set Brewer in its operating location. Level the Brewer. A spirit
level should be placed on the top of the unit, at the edge, as a
guide when making level adjustments.

Level the unit from left to right and front to back by turning the
adjustable feet. Be sure all four feet touch the counter to prevent
tipping.

PLUMBER’S INSTALLATION INSTRUCTIONS
Brewer should be connected to a POTABLE WATER, COLD

WATER line. Flush water line before connecting to Brewer.

DO NOT use a saddle valve with a self-piercing tap for the water
line connection. Such a tap can become restricted by waterline
debris. For systems that must use a saddle tap, shut off the
main water supply and drill a 3/16” (minimum) tap for the saddle
connection, in order to insure an ample water supply. Remember

to ush the line prior to installing the saddle.

The brewer must be installed on a water line with average
pressure between 20 PSI and 90 PSI. If your water pressure
exceeds 90 PSI at anytime, a pressure regulator must be
installed in the water supply line to limit the pressure to not more
than 90 PSI in order to avoid damage to lines and solenoid.

Plumber must provide two 1/4” female are water supplies for this

brewer.
A water shut-off valve should be installed on the incoming water

line in a convenient location (Use a low restriction type valve,

such as a 1/4-turn ball valve, to avoid loss of water ow thru the

valve.

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

4

INSTALLATION INSTRUCTIONS (continued)

IL1615

NSF requires that the brewer be able to be moved for cleaning

underneath. A ex line or loops of copper tubing will satisfy this

requirement. See Figure 2 below.

Fig. 2 Water Supply Installation

In some areas, local codes require a backow preventer

(check valve) to be installed on the inlet water line. If a backow

preventer is used, you must install a water hammer arrester in the

incoming line, between the backow preventer and the brewer

inlet, as far away from the brewer as space will allow. This will
relieve the excessive back pressures that can cause faucet leaks
and solenoid malfunctions.

ELECTRICIAN’S INSTALLATION INSTRUCTIONS

REFER TO ELECTRICAL SPECIFICATIONS - Page 1

Check the nameplate to determine correct electrical service
required for the Brewer to be installed.

IMPORTANT: Before connecting to electricity, make sure
automatic brewers are connected to the water supply.

NOTE: This equipment must
be installed to comply with
applicable federal, state and
local plumbing codes and
ordinances.

WARNING:

SHOCK HAZARD

Brewer must be properly
grounded to prevent possible
shock hazard. DO NOT
assume a plumbing line
will provide such a ground.
Electrical shock will cause death
or serious injury.

IMPORTANT: Do not connect
brewer to electrical power until

the tank is lled with water.

Pour water into the pour-over

opening until water ows from

the brew head.

IMPORTANT:

Supply power must match
nameplate for voltage and
phase. Connecting to the
wrong voltage will damage the
brewer or result in decreased
performance. Such damage is
not covered by warranty.

Brewers must be wired by an electrician, and require a dedicated
115/230V or 120/240V 20A circuit (50/60 Hz, L1, L2, Neutral,
plus ground). Remove front panel to gain access to terminal
block. Green terminal must be connected to a suitable building
ground. Circuit must be capable of 4000 Watts (model 1090 and

1092) or 7000 Watts (model 1091 and 1093).

See gure 3 at right.

IMPORTANT: Wiring must be installed in approved solid or

exible conduit, and must be secured to the brewer with a strain

relief (to be provided by the installer).

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

5

Fig. 3 115/240V Terminal Block

OPERATION

Fig. 4 Brewer Operation Diagram

A.IMPORTANT:

Tank must be full of
water before connecting
brewer to electrical power.
Heating elements will be
damaged if allowed to
operate without being fully
submerged in water.
Damage caused by
operating the brewer
without water in the tank
is NOT COVERED BY
WARRANTY.

For initial start-up, or if the brewer has not been used for an

• Be sure spray disk and brew gasket are properly installed in the

• Be sure the water supply is properly connected and the water

• Be sure the WATER TANK IS FILLED
BEFORE plugging the brewer into a receptacle, or otherwise

Once the tanks are full of water, connect the brewer to electrical
The heating elements will begin heating the water in the tank.

START-UP

extended period of time:

brew head.

supply valve is turned ON.

connecting brewer to electrical power ThE WATER TANkS MuST
BE FILLED. Place an empty decanter under each brew head. Lift
the pour-over cover then pour tap water into each pour-over

opening until water ows from the brew heads. This will require the

equivalent of three full 64oz. Decanters per side. When water stops
dripping from the brew head, empty the container.

power. For Models 1091 & 1093, press power switch to ON.
When the water has reached the proper temperature, the

“READY TO BREW” LED will glow.

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

6

OPERATION (continued)

WATER HEATER

Water temperature is sensed by an electronic water
temperature probe inserted into the water tank.
This temperature signal is fed to the controller.

The setpoint temperature is adjustable. The
controller sends a command signal to the power
board based upon a comparison between the
setpoint temperature and actual temperature.
See page 15.

The power board energizes the heating elements
based on the command signal from the controller.

Excessive temperature will trip the hi-limit safety
switch. The hi-limit will automatically reset when
the brewer cools.

WATER FLOW

POUR-OVER FEATURE

Pouring any amount of water into the pour-over
opening and into the basin pan forces an identical
amount of heated water out of the tank and through
the spray head.

AUTOMATIC OPERATION

Pressing the BREW key energizes the solenoid
valve, allowing water from an external water supply

to ow into the water tank. The incoming water

forces heated water out of the tank to perform the
brew.

The solenoid uses a ow control device so that
ow is consistent between 20 p.s.i. and 90 p.s.i.

The length of time the solenoid is open is controlled
by the time setting of the controller. See page 18.

After the solenoid closes, water will continue to ow

to the brew chamber until
the water level in the tank falls below the brew
pickup, breaking the siphon.

HOT WATER FAUCET

The faucet water coil is submerged in the hot water
tank and draws heat from the brew water. Wa­ter going to the water coil is not controlled by the
solenoid valve.

Hot water is provided at the faucet, at supply water
pressure, any time the faucet shut-off valve is

OPEN

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers

.

Fig. 5 heat Control Diagram

Fig. 6 Water Flow Diagram

7

OPERATION (continued)

IMPORTANT:

DO NOT energize this
brewer until the water

tank has been lled. Dry
ring will damage heating

elements. See page 6.

Fig. 7 Turning Brewer
on or off

ELECTRONIC FEATURES

Energizing the Brewer

When electric power is applied to the unit, all the lights will ash four

times and four beeps will sound. The unit will be off.

Press the ON/OFF key. Four beeps will sound and all lights will ash

once. The POWER indicator will remain on. If the water temperature
is more than 10ºF below the setpoint, the HEAT indicator will glow until
water temperature reaches setpoint.

Press the ON/OFF key again to turn the brewer off. Three beeps will
sound, the tank heater and all warmers will be switched off, and all
indicator lights will go out.

Brew Settings

See pages 15 & 16 for setting Brew Time and Temperature.

ABS™ (Automatic Brew Start)

Start a brew by pressing BREW. A single beep will sound. The system
will verify that the water in the tank is at the proper temperature. If it is,

brew will start immediately. Otherwise, the BREW indicator will ash

(Brew Waiting Mode) until the water reaches setpoint temperature,
then the indicator will glow and brew will commence. If the main
warmer is off, it will be energized automatically.

At the conclusion of the brew cycle, three beeps will sound.
NOTE: To override Brew Waiting Mode, press and hold the BREW key

for 3 seconds while the BREW indicator is ashing. Brew will begin

regardless of water temperature. To avoid under-temperature brews,
this feature should only be used when setting brew volumes.

Fig. 8 Initiate a Brew

Fig 9 Brew Cancel

NOTE: Brew Waiting Mode (BREW indicator ashing) prevents

multiple, unattended brews. While the BREW indicator is on or

ashing, any additional strokes of the BREW key will be ignored (there

will be a beep each time the key is pressed, however). Another brew
cannot be initiated until the previous brew is complete.

The Brew Waiting Time, also called Dripout Time, (interval between
when the brew is initiated and the audible signal sounds at the end
of the brew) may be adjusted between 2 and 8 minutes at the Brew
Signal Timer dial on the controller. See page 16.

Brew Cancel

To cancel a brew in progress or a brew in waiting, press the CANCEL
key. Two beeps will sound and the BREW indicator will go out.

NOTE: If a brew in progress is cancelled, coffee will continue to ow

until all water delivered has dripped through the brew chamber.

8

645 p/n DD-75908 Owners Manual Dual Airpot And Thermal Coffee Brewers